Personalized Medicine: What Genetic Testing Can Really Tell You
Consumer genetic testing promises personalized health insight. Here's an honest look at what it can actually reliably tell you.
Genetic testing can reliably identify specific, well-understood genetic markers linked to certain inherited conditions and can provide generally accurate ancestry estimates, both areas where the underlying science is well established.
Where the science is genuinely solid
Testing for specific, well-researched genetic conditions with a clear, direct genetic cause offers meaningfully reliable results that can inform real medical decisions, particularly around certain hereditary cancer risks and other well-studied conditions.
Where the predictive claims are much weaker
Many consumer genetic reports also offer predictions about traits and disease risks influenced by numerous genes interacting with lifestyle and environment, areas where the science remains far less precise, meaning these particular results are better treated as a general, uncertain indication rather than definitive personal insight.